Authors: Anil Kumar; Raj Kumar
Addresses: Department of Mechanical Engineering, YMCA University of Science & Technology, Faridabad 121006, India ' Department of Mechanical Engineering, YMCA University of Science & Technology, Faridabad 121006, India
Abstract: A transcritical N2O compression refrigeration cycle, an absorption, an ejector and a cascade refrigeration cycle have been combined with a producer gas engine to make a proposed 'biomass-based integrated refrigeration cycle'. The use of the shaft power of an engine as well as its exhaust gas thermal energy for cooling production enhances the energy and exergy efficiency of this cycle significantly. The system performance and exergy destruction in the different components have been evaluated based on the energetic and exergetic analysis, which helps to judge the possible performance improvement of the cycle. The refrigerants used and the exhaust gas emissions samples have significant reduction in the global environmental-related problems. The results exhibit that the high value of the exhaust gas temperature/ejector evaporator temperature/entrainment ratio of ejector and the low value of the condenser temperature/turbine inlet pressure have significant effects on the refrigeration outputs, energy and exergy efficiency.
Keywords: integrated refrigeration; exhaust gas; waste heat; cascade refrigeration; exergy analysis; transcritical refrigeration; ejector; thermodynamic analysis; biomass; compression refrigeration cycle; energy efficiency; exergy efficiency; refrigerants; exhaust gas emissions.
International Journal of Exergy, 2015 Vol.16 No.2, pp.214 - 238
Received: 22 Jul 2013
Accepted: 09 Dec 2013
Published online: 22 Mar 2015 *